Home / 78,943.57-108,949.52-43,138.91

Finding the Fourth Proportional to 78,943.57, 108,949.52 and 43,138.91

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Solution

The fourth proportional to 78,943.57, 108,949.52 and 43,138.91 is: 59,535.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,943.57 : 108,949.52 = 43,138.91 : x
  2. Step 2: Convert to fraction form
    78,943.57/108,949.52 = 43,138.91/x
  3. Step 3: Cross multiply
    78,943.57x = 108,949.52 × 43,138.91
  4. Step 4: Simplify right side
    78,943.57x = 4,699,963,918.04
  5. Step 5: Solve for x
    x = 4,699,963,918.04/78,943.57
  6. Step 6: Final answer
    x = 59,535.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.